Make show/ls/list follow links by passing -l to tree.

The `read` builtin accepts backslash notation for common non-printing
characters by default, like `\t` and `\n`. This requires that any
literal backslashes must also be escaped as `\\`.

Given that `gpg -e` does not interpret input, the `read` invocations are
changed to do the same.

Also, the right hand side of an `==` comparison within `[[ ]]` must be
quoted in order to suppress pattern metacharacter expansion. Quoting the
bash manual:

    When the == and != operators are used, the string to the right of
    the operator is considered a pattern and matched according to the
    rules described below under Pattern Matching.

Reported-by: Paul Wise <pabs@debian.org>

Redefine GNUPG and GETOPT for port paths
Redefine tmpdir() for a different ramdisk path

Reported-by: Simon KP <si@eskp.net>

Reported-by: Brian Mattern <rephorm@rephorm.com>

Get rid of push/pull shortcuts, as they weren't widely used.
Add contents to repo on git init.
Centralize git add logic, and make it less error prone.

Laurent asked for this.

Reported-by: Laurent Ghigonis <laurent@p1sec.com>

Reported-by: Laurent Ghigonis <laurent@p1sec.com>

Reported-by: Brian Mattern <rephorm@rephorm.com>

Right now, every time I call pass to decrypt a key, I get output like:

  You need a passphrase to unlock the secret key for
  user: "User Name <user@domain.com>"
  2048-bit ELG-E key, ID XXXXXXNX, created 2012-04-20 (main key ID NNXXNNNX)
  password

This patch cleans it up so that only the password is output. I use
pinentry-gtk-2 to enter the gpg passphrase, so this information is
redundant to me. I haven't tried other pinentry versions to see if they
repeat the information as well.

Currently, if you hit ctrl-c at the standard 'Enter password' prompt,
since it is piped directly to gpg, the entry gets cleared. Trying to
read from that entry results in:

  gpg: [don't know]: 1st length byte missing

This patch fixes this.

Tweaked by Jason A. Donenfeld <Jason@zx2c4.com> to add GNU readline
features by using -e in read.